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Joanna Karpińska

Other affiliations: University of Warsaw
Bio: Joanna Karpińska is an academic researcher from University of Białystok. The author has contributed to research in topics: Coenzyme Q10 & Photodegradation. The author has an hindex of 19, co-authored 82 publications receiving 1266 citations. Previous affiliations of Joanna Karpińska include University of Warsaw.


Papers
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Journal ArticleDOI
15 Nov 2004-Talanta
TL;DR: The presented paper provides useful information about state-of-the-art and possibilities offered by derivative spectrophotometry in pharmaceutical, clinical or environmental fields of analysis.

130 citations

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TL;DR: In this paper, a comprehensive study is presented, on the occurrence, removal, mass loading, and environmental risk assessment of 19 multi-class emerging organic contaminants in three Municipal Solid Waste landfills and three Wastewater Treatment Plants located at northeast Poland.

107 citations

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TL;DR: The proposed HPLC method with UV detection was applied to the determination of the levels of retinol, tocopherol and coenzyme Q(10) in plasma of healthy children and children treated by elimination diet.

96 citations

Journal ArticleDOI
TL;DR: The physical and chemical properties of 2, 10-disubstituted phenothiazine derivatives are described in detail in this article in detail, such as their physical state, thermal stability and solubility.
Abstract: Phenothiazine derivatives substituted in the 2 and 10 positions belong to a big group of tricyclic aromatic compounds. They are in extensive use in psychiatry as tranquilizers and neuroleptics. Due to their characteristic structure they exhibit many valuable analytical properties. They are easily oxidized in an acidic medium while generating color products. They also react with some thiocyanate and halide complexes of metals as well as some organic compounds, and form well-defined ion-association complexes. The properties mentioned above are the basis for utilizing the phenothiazine derivatives as reagents for chemical analysis. The physical and chemical properties of 2, 10-disubstituted phenothiazine derivatives are described in the presented paper in detail. The paper is divided into seven parts. The first chapter presents the physical properties of the phenothiazine derivatives, such as their physical state, thermal stability and solubility. The next part of the paper is devoted to the spectral properties of 2, 10-disubstituted phenothiazine derivatives. The influence of the type of substituents on the intensity and shape of the UV and fluorescence spectra of phenothiazine derivatives are discussed. Chapters 4 and 5 show the run and the mechanism of phenothiazine derivatives oxidation, their electrochemical properties and the analytical aspects of the described processes. Chapter 6 of the present paper is devoted to the complexing abilities of the phenothiazine derivatives. The paper is based on a review of the chemical literature up to 1995. A short specification of the analytical methods utilizing the physical and chemical properties of the phenothiazine derivatives is also included.

91 citations


Cited by
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[...]

08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

Journal ArticleDOI
TL;DR: In this paper, the mineralization process of carbamazepine solutions can be described using pseudo-second-order kinetics, where persulfate anions were simultaneously activated by heat energy (thermal, ultrasound), UV-C light, Fe2+ ions, and hydrogen peroxide.
Abstract: In situ chemical oxidation of a carbamazepine solution was performed using persulfate anions simultaneously activated by heat energy (thermal, ultrasound), UV-C light, Fe2+ ions, and hydrogen peroxide. The main objective of this study was to analyze the mineralization reactions that occurred during the studied operating conditions. Solution TOC removal was nearly complete (99%) within 90 min, which prevented the accumulation of toxic intermediates. The mineralization process of carbamazepine solutions can be described using pseudo-second-order kinetics. Under acidic conditions, Fe2+ can exhibit catalytic effects on H2O2 decomposition and persulfate activation. With excess persulfate, an unproductive S2O82− decomposition reaction (with no generation of SO4 −) or a rapid reaction between excess sulfate radicals to produce sulfate anions could occur. Sulfate and hydroxyl radicals were involved in the main mineralization pathway. The influences of chloride ions on mineralization were also evaluated. The results demonstrated that this activated persulfate-based oxidation system could be used to control water pollution by emerging contaminants, such as carbamazepine.

230 citations

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219 citations

Journal ArticleDOI
TL;DR: It is suggested that the presence of diclofenac and its metabolites in the environment may represent a high risk because of their synergistic interactions with existing contaminants, leading to the development of drug-resistant strains and the formation of newly emerging pollutants.

217 citations